检索结果-南通市图书馆

Acta Metallurgica sinica(English Letters) 2000年第2期13卷 821-824页

作者： Y. Li j. P. Zhao H. M. Huang j. C. Han and s. Y. Du (Harbin Institute of Technology, Harbin 150001, China)

Ni0.35Zn0.65Fe2O4 ferrite was synthesized by sHs method. In the process of sHs, combustion temperature and velocity were the main process parameters , which were decided by the Fe content, grain size of the ferrite powder, relative density and the oxygen pressure. In this paper the effects of Fe content, grain size and oxygen pressure on combustion temperature and velocity were discussed. The relation between combustion temperature and magnetic permeability was also studied and the method of polynomial regression was used to establish the mathematical model of the relation.

关键词： combustion temperature combustion velocity Fe content relative density,oxygen pressure,mathematical model

PET-modified red mud as catalysts for oxidative desulfurization reactions

在线全文

学校读者我要写书评

暂无评论

journal of Environmental sciences 2017年第7期29卷 312-320页

作者： Nayara T.do Prado Ana P.Heitmann Herman s.Mansur Alexandra A.Mansur Luiz C.A.Oliveira Cinthia s.de Castro Department of Chemistry Federal University of Minas GeraisAv.Antonio Carlos 6627Campus Pampulha31270-901BH-MGBrazil Department of Metallurgical and Materials Engineering Au.Antonio Carlos 6627Campus Pampulha31270-901BH-MGBrazil

This work describes the synthesis of catalysts based on red mud/polyethylene terephthalate（PET） composites and their subsequent heat treatment under N2 *** materials were characterized by scanning electron microscopy（sEM）,temperature programmed reduction（TPR）,Fourier transform infrared spectroscopy（FT–IR）,X-ray diffraction（XRD）,thermogravimetric（TG） analysis and N2adsorption/*** catalysts were evaluated in the oxidative desulfurization reaction of dibenzothiophene（DBT） in a biphasic *** results indicated that the PET impregnation on red mud increased the affinity of the catalyst with the nonpolar phase（fuel）,in which the contaminant was dissolved,allowing a higher conversion（up to 80%） and selectivity to the corresponding dibenzothiophene *** sulfone compound is more polar than DBT and diffused into the polar solvent as indicated by the data obtained via gas chromatography–mass spectrometry（GC–Ms）.

关键词： Red mud PET Dibenzothiophene Desulfurization Dibenzothiophene sulfone

Recurrent Glioblastoma Multiforme—A strategy for Long-Term survival

在线全文

学校读者我要写书评

暂无评论

journal of Cancer Therapy 2014年第10期5卷 957-976页

作者： stanislaw R. Burzynski Gregory s. Burzynski Tomasz j. janicki Burzynski Clinic Houston Texas USA

Recurrent GBM (RGBM) has a highly unfavorable prognosis with majority of patients dying within 6 months and no standard treatments available. Antineoplaston (ANP) A10 and As2-1 injections underwent Phase II trials in RGBM patients, which reported a long-term overall survival (Os) in a small percentage of patients. The additional Phase II studies BT-07, and BT-21 with ANP in GBM also revealed cases of a long-term Os. ANP shares active ingredients with metabolites of sodium phenylbutyrate (PB), which was used in private practice setting in combination of targeted and chemotherapeutic agents for the treatment of RGBM. The treatment contributed to cases of rapid complete response (CR) and significant Os. This paper provides case studies of three patients treated with ANP under Phase II protocols and two patients treated with PB in combination with targeted therapy, who obtained CR and long-term Os. Based on these studies and basic research on the effects of ANP and PB on the genome of GBM and review of results of preclinical and clinical research on targeted agents, the authors suggest a new strategy for successful treatment of RGBM. They propose Phase I/II clinical trials with ANP and PB in combination with targeted agents, bevacizumab (BVZ), pazopanib, dasatinib and everolimus in patients with RGBM after failure of standard surgery, radiation therapy (RT) and chemotherapy including temozolomide (TMZ) to be conducted to evaluate survival, response and toxicity in these patients.

关键词： Antineoplastons A10 and As2-1 Recurrent Glioblastoma Multiforme HDAC Inhibitor Phase II Clinical Trials Glioblastoma survival Phenylbutyrate Targeted Therapy

Mathematical modeling of contact tracing as a control strategy of Ebola virus disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International journal of Biomathematics 2018年第7期11卷 239-274页

作者： T.Berge A.j.Ouemba Tasse H.M.Tenkam j.Lubuma Department of science Mathematics and Applied Mathematics University of Pretoria Private Bag X20 Pretoria 0028South Africa Department of Mathematics and Computer science University of Dschang P.O.Box 67 DschangCameroon Department of Mathematics and Applied Mathematics North-West University Private Bag X1290 Potchefstroom 2520South Africa

More than 20outbreaks of Ebola virus disease have occurred in Africa since 1976,and yet no adequate treatment is ***,prevention,control measures and supportive treatment remain the only means to avoid the *** these measures,contact tracing occupies a prominent *** this paper,we propose a simple mathematical model that incorporates imperfect contact tracing,quarantine and hospitalization (or isolation).The control reproduction number Rc of each sub-model and for the full model are ***,we prove that when Tic is less than one,the corresponding model has a unique globally asymptotically stable disease-free ***, when Rc is greater than one,the disease-free equilibrium becomes unstable and a unique globally asymptotically stable endemic equilibrium ***,we numerically support the analytical results and assess the efficiency of different control *** main observation is that,to eradicate EVD,the combination of high contact tracing (up to 90%)and effective isolation is better than all other control measures,namely:(1) perfect contact tracing,(2)effective isolation or full hospitalization,(3)combination of medium contact tracing and medium isolation.

关键词： Ebola contact tracing quarantine isolation control reproduction number global stability

On the Need for Fractal Logic in High Energy Quantum Physics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International journal of Modern Nonlinear Theory and Application 2012年第3期1卷 84-92页

作者： M. s. El Naschie s. Olsen j. H. He s. Nada L. Marek-Crnjac A. Helal College of Central Florida Ocala USA Department of Mathematics Faculty of Science Cairo University Giza Egypt Department of Physics Faculty of Science University of Alexandria Alexandria Egypt Mathematics Department Qatar University Doha Qatar Nantong Textile Institute National Engineering Laboratory for Modern Silk College of Textile and Clothing Soochow University Suzhou China Technical school Center of Maribor Maribor Slovenia

Modern advances in pure mathematics and particularly in transfinite set theory have introduced into the fundamentals of theoretical physics many novel concepts and devices such as fractal quasi manifolds with non-integer (Hausdorff) dimension for its geometry as well as infinite dimensional wild topology and non classical fuzzy logic. In the present work transfinite fractal sets and fuzzy logic are combined to enable the introduction of a new theory termed fractal logic to the foundation of high energy particle physics. This leads naturally to a new look at quantum gravity. In particular we will show that to understand and develop quantum gravity we have to bring various fields together, particularly fractals and nonlinear dynamics as well as sphere packing, fuzzy set theory, number theory and quantum entanglement and irrationally q-deformed algebra.

关键词： Fractal Fuzzy Logic Hausdorff Dimension Cantorian space-Time Golden Mean

Ductility improvement of GFRP-RC beams using precast confined concrete block in compression zone

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of structural and Civil Engineering 2023年第10期17卷 1585-1598页

作者： Nooshin G.AMIRABAD Farshid j.ALAEE Meysam jALALI Civil Engineering Department Shahrood University of TechnologyShahrood ***Iran

Fiber-reinforced polymers(FRPs)have received considerable research attention because of their high strength,corrosion resistance,and low ***,owing to the lack of ductility in this material and the quasi-brittle behavior of concrete,FRP-reinforced concrete(FRP-RC)beams,even with flexural failure,do not fail in a ductile *** the limited deformation capacity of FRP-RC beams depends on the ductility of their compression zones,the present study proposes using a precast confined concrete block(PCCB)in the compression zone to improve the ductility of the beams.A control beam and four beams with different PCCBs were cast and tested under four-point bending *** control beam failed due to shear,and the PCCBs exhibited different confinements and *** goal was to find an appropriate PCCB for use in the compression zone of the beams,which not only improved the ductility but also changed the failure mode of the beams from shear to *** the employed blocks,a ductile PCCB with low equivalent compressive strength increased the ductility ratio of the beam to twice that of the control *** beam failed in pure flexure with considerable deformation capacity and without significant stiffness reduction.

关键词： ductility four-point bending test glass fiber-reinforced polymer precast confined concrete block

Transforming layered 2D mats into multiphasic 3D nanofiber scaffolds with tailored gradient features for tissue regeneration

在线全文

学校读者我要写书评

暂无评论

BMEMat(BioMedical Engineering Materials) 2024年第1期2卷 160-179页

作者： s.M.shatil shahriar Navatha shree Polavoram syed Muntazir Andrabi Yajuan su Donghee Lee Huy Quang Tran samantha j.s.hindler jingwei Xie Department of surgery-Transplant and Mary&Dick Holland Regenerative Medicine Program College of MedicineUniversity of Nebraska Medical CenterOmahaNebraskaUSA Eppley Institute for Research in Cancer and Allied Diseases College of MedicineUniversity of Nebraska Medical CenterOmahaNebraskaUSA Department of Mechanical and Materials Engineering University of Nebraska LincolnLincolnNebraskaUSA

Multiphasic scaffolds with tailored gradient features hold significant promise for tissue regeneration applications. Herein, this work reports the transformation of two-dimensional (2D) layered fiber mats into three-dimensional (3D) multiphasic scaffolds using a ‘solids-of-revolution’ inspired gas-foaming expansion technology. These scaffolds feature precise control over fiber alignment, pore size, and regional structure. Manipulating nanofiber mat layers and Pluronic F127 concentrations allows further customization of pore size and fiber alignment within different scaffold regions. The cellular response to multiphasic scaffolds demonstrates that the number of cells migrated and proliferated onto the scaffolds is mainly dependent on the pore size rather than fiber alignment. In vivo subcutaneous implantation of multiphasic scaffolds to rats reveals substantial cell infiltration, neo tissue formation, collagen deposition, and new vessel formation within scaffolds, greatly surpassing the capabilities of traditional nanofiber mats. Histological examination indicates the importance of optimizing pore size and fiber alignment for the promotion of cell infiltration and tissue regeneration. Overall, these scaffolds have potential applications in tissue modeling, studying tissue-tissue interactions, interface tissue engineering, and highthroughput screening for optimized tissue regeneration.

关键词： expansion gradients multiphasic scaffolds nanofiber mats tissue regeneration

CRYsTAL sTRUCTURE AND MORPHOLOGY OF NAsCENT sAMPLEs OF sYMMETRIC AROMATIC POLYEsTERs——Ⅱ. POLY(p-PHENYLENE 2,6-NAPHTHALATE)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese journal of Polymer science 2003年第2期21卷 205-221页

作者： j.Yang j.Wang G.sidoti j.Liu F.Rybnikar M.Kaszonyiova P.H.Geil DepartmentofMaterialsscienceandEngineering UniversityofIllinoisUrbanaIL6180 TomasBataUniversityofZlin ZlinCzechRepublic

Confined thin film melt polymerization (CTFMP) of naphthalene chloride/hydroquinone (NCMQ, 1/1, molar)mixtures at polymerization temperatures (T_p) below ca. 300℃ resulted in relatively thick, elongated crystals. Polymerizationof NC/HQ above 300℃ between glass yielded well-formed lamellar crystals ca. 100 A thick. Phase Ⅰ and Ⅱ [001] EDpatterns were obtained for all T_p, the relative amount of phase Ⅰ increasing with T_p. Polymerization of naphthalenedicarboxylic acid/hydroquinione diacetate 1/1 mixtures at high T_p also yielded lamellar crystals that "curled up" off of thesubstrate. When the high temperature CTFMP polymerization was conducted between mica, aggregates of lamellae on-edgedeveloped but epitaxial growth did not occur. Epitaxial growth of lamellae between mica could be obtained, however, byconfined thin film solution polymerization, with both of the latter samples yielding apparently related ED patterns from adifferent unit cell than phase Ⅰ or Ⅱ. Fiber patterns, obtained from sheared samples, indicated considerably greater crystaldisorder than in the nascent crystals. Refinement of the phase Ⅰ unit cell parameters, based on the [001] and [01 1] EDpatterns, with modeling based on Cerius^2, suggests a monoclinic phase Ⅰ unit cell with a = 7.76, b = 5.71, c = 14.99 A, α = γ= 90°, β= 99.7°, ρ = 1.47 g/cm^3, space group P12_1/al.

关键词： Poly(p-phenylene 2,6-naphthalate Crystal structure Morphology Confined thin film melt polymerization

同方期刊数据库

非增强CT与和双能量CT结合可提高早期痛风的诊断

在线全文

学校读者我要写书评

暂无评论

国际医学放射学杂志 2019年第3期 369-370页

作者：曹娜娜 s.K.Lee j.Y.jung W.H jee j.j.Lee s.H.Park Department of Radiology Seoul St.Mary’s HospitalCollege of MedicineThe Catholic University of Korea

摘要目的探讨痛风早期出现症状的第一跖趾关节的非增强CT(NCCT)对双能CT(DECT)的增值。方法连续记录115例有关节疼痛的病人,根据2015年EULAR/ACR标准

关键词： CT

COMPUTING KARMARKAR's PROjECTIONs QUICKLY BY UsING MATRIX FACTORIZATION

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics(A journal of Chinese Universities) 1996年第3期11卷 355-360页

作者： j.R.BIRGE AND TANG HENGYONG(Department of industrial and Operations Engineering,The University of Michigan,Ann ArborMI 48109,U.s.A.)(Department of Mathematics and Computer, shenyang Teacher’s College, shenyang 110031, China.) Department of Industrial and Operations Engineering The University of Michigan Ann Arbor USA Department of Mathematics and Computer Shenyang Teacher’s College Shenyang China

In this paper we compute Karmarkar's projections quickly using MoorePenrose g-inverse and matrix factorization. so the computation work of (ATD2A)-1is decreased.

关键词： Linear programming Karmarkar's algorithm Karmarkar's projection MoorePenrose g-inverse matrix factorization.